xref: /openbmc/linux/scripts/config (revision ecba1060) 
1#!/bin/bash
2# Manipulate options in a .config file from the command line
3
4usage() {
5	cat >&2 <<EOL
6Manipulate options in a .config file from the command line.
7Usage:
8config options command ...
9commands:
10	--enable|-e option   Enable option
11	--disable|-d option  Disable option
12	--module|-m option   Turn option into a module
13	--set-str option value
14	                     Set option to "value"
15	--state|-s option    Print state of option (n,y,m,undef)
16
17	--enable-after|-E beforeopt option
18                             Enable option directly after other option
19	--disable-after|-D beforeopt option
20                             Disable option directly after other option
21	--module-after|-M beforeopt option
22                             Turn option into module directly after other option
23
24	commands can be repeated multiple times
25
26options:
27	--file .config file to change (default .config)
28
29config doesn't check the validity of the .config file. This is done at next
30 make time.
31EOL
32	exit 1
33}
34
35checkarg() {
36	ARG="$1"
37	if [ "$ARG" = "" ] ; then
38		usage
39	fi
40	case "$ARG" in
41	CONFIG_*)
42		ARG="${ARG/CONFIG_/}"
43		;;
44	esac
45	ARG="`echo $ARG | tr a-z A-Z`"
46}
47
48set_var() {
49	local name=$1 new=$2 before=$3
50
51	name_re="^($name=|# $name is not set)"
52	before_re="^($before=|# $before is not set)"
53	if test -n "$before" && grep -Eq "$before_re" "$FN"; then
54		sed -ri "/$before_re/a $new" "$FN"
55	elif grep -Eq "$name_re" "$FN"; then
56		sed -ri "s:$name_re.*:$new:" "$FN"
57	else
58		echo "$new" >>"$FN"
59	fi
60}
61
62if [ "$1" = "--file" ]; then
63	FN="$2"
64	if [ "$FN" = "" ] ; then
65		usage
66	fi
67	shift 2
68else
69	FN=.config
70fi
71
72if [ "$1" = "" ] ; then
73	usage
74fi
75
76while [ "$1" != "" ] ; do
77	CMD="$1"
78	shift
79	case "$CMD" in
80	--refresh)
81		;;
82	--*-after)
83		checkarg "$1"
84		A=$ARG
85		checkarg "$2"
86		B=$ARG
87		shift 2
88		;;
89	--*)
90		checkarg "$1"
91		shift
92		;;
93	esac
94	case "$CMD" in
95	--enable|-e)
96		set_var "CONFIG_$ARG" "CONFIG_$ARG=y"
97		;;
98
99	--disable|-d)
100		set_var "CONFIG_$ARG" "# CONFIG_$ARG is not set"
101		;;
102
103	--module|-m)
104		set_var "CONFIG_$ARG" "CONFIG_$ARG=m"
105		;;
106
107	--set-str)
108		set_var "CONFIG_$ARG" "CONFIG_$ARG=\"$1\""
109		shift
110		;;
111
112	--state|-s)
113		if grep -q "# CONFIG_$ARG is not set" $FN ; then
114			echo n
115		else
116			V="$(grep "^CONFIG_$ARG=" $FN)"
117			if [ $? != 0 ] ; then
118				echo undef
119			else
120				V="${V/CONFIG_$ARG=/}"
121				V="${V/\"/}"
122				echo "$V"
123			fi
124		fi
125		;;
126
127	--enable-after|-E)
128		set_var "CONFIG_$B" "CONFIG_$B=y" "CONFIG_$A"
129		;;
130
131	--disable-after|-D)
132		set_var "CONFIG_$B" "# CONFIG_$B is not set" "CONFIG_$A"
133		;;
134
135	--module-after|-M)
136		set_var "CONFIG_$B" "CONFIG_$B=m" "CONFIG_$A"
137		;;
138
139	# undocumented because it ignores --file (fixme)
140	--refresh)
141		yes "" | make oldconfig
142		;;
143
144	*)
145		usage
146		;;
147	esac
148done
149
150